opengl 立方体 绕自身固定轴旋转

[tew29592]

正方体初始位置它的自身坐标系和世界坐标系是一样，并且物体的自身坐标系和物体本身绑定在一起。）

如何实现物体绕自身轴旋转。 绕Z轴旋转后，它的x y轴在世界坐标系就改变了，此时绕x轴旋转就是绕它固定在自身的x轴。下面
是我的程序，不胜感谢！

#include "StdAfx.h"
#include<gl/freeglut.h>
static GLfloat xrot = 0.0;
static GLfloat yrot = 0.0;
static GLfloat zrot = 0.0;
void cube()//绘制立方体
{
glBegin(GL_LINES);//绘制坐标轴
glPointSize(8);
glLineWidth(2);
glColor3f(1,0.5,0);
glVertex3f(0,0,0);
glVertex3f(0,1,0);
glVertex3f(0,0,0);
glVertex3f(1,0,0);
glVertex3f(0,0,0);
glVertex3f(0,0,1);
glEnd();
glBegin(GL_QUADS);//绘制立方体
glColor3f(1.0,0.0,0.0); //红 y轴
/* glVertex3f( 1.0, 1.0,-1.0);
glVertex3f(-1.0, 1.0,-1.0);
glVertex3f(-1.0, 1.0, 1.0);
glVertex3f( 1.0, 1.0, 1.0);*/
glVertex3f( 0.5, 0.5,-0.5);
glVertex3f(-0.5, 0.5,-0.5);
glVertex3f(-0.5, 0.5, 0.5);
glVertex3f( 0.5, 0.5, 0.5);

glColor3f(0.0,1.0,0.0); //绿
/* glVertex3f( 1.0,-1.0, 1.0);
glVertex3f(-1.0,-1.0, 1.0);
glVertex3f(-1.0,-1.0,-1.0);
glVertex3f( 1.0,-1.0,-1.0);*/
glVertex3f( 0.5,-0.5, 0.5);
glVertex3f(-0.5,-0.5, 0.5);
glVertex3f(-0.5,-0.5,-0.5);
glVertex3f( 0.5,-0.5,-0.5);

glColor3f(0.0,0.0,1.0); //蓝 x轴
/* glVertex3f( 1.0, 1.0, 1.0);
glVertex3f(-1.0, 1.0, 1.0);
glVertex3f(-1.0,-1.0, 1.0);
glVertex3f( 1.0,-1.0, 1.0);*/
glVertex3f( 0.5, 0.5, 0.5);
glVertex3f(-0.5, 0.5, 0.5);
glVertex3f(-0.5,-0.5, 0.5);
glVertex3f( 0.5,-0.5, 0.5);

glColor3f(1.0,1.0,0.0); //黄
/*glVertex3f( 1.0,-1.0,-1.0);
glVertex3f(-1.0,-1.0,-1.0);
glVertex3f(-1.0, 1.0,-1.0);
glVertex3f( 1.0, 1.0,-1.0);*/
glVertex3f( 0.5,-0.5,-0.5);
glVertex3f(-0.5,-0.5,-0.5);
glVertex3f(-0.5, 0.5,-0.5);
glVertex3f( 0.5, 0.5,-0.5);

glColor3f(0.6,0.2,0.2); //棕
/*glVertex3f(-1.0, 1.0, 1.0);
glVertex3f(-1.0, 1.0,-1.0);
glVertex3f(-1.0,-1.0,-1.0);
glVertex3f(-1.0,-1.0, 1.0);*/
glVertex3f(-0.5, 0.5, 0.5);
glVertex3f(-0.5, 0.5,-0.5);
glVertex3f(-0.5,-0.5,-0.5);
glVertex3f(-0.5,-0.5, 0.5);

glColor3f(0.6,0.1,0.9); //紫 z轴
/* glVertex3f( 1.0, 1.0,-1.0);
glVertex3f( 1.0, 1.0, 1.0);
glVertex3f( 1.0,-1.0, 1.0);
glVertex3f( 1.0,-1.0,-1.0);*/
glVertex3f( 0.5, 0.5,-0.5);
glVertex3f( 0.5, 0.5, 0.5);
glVertex3f( 0.5,-0.5, 0.5);
glVertex3f( 0.5,-0.5,-0.5);
glEnd();
}

void display(void)//显示
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
//glPushMatrix();
glTranslatef(0, 0, -5);
//glTranslatef(0,0,0);
glRotatef(xrot, 0.5, 0, 0);
//glTranslatef(0,0,0);
//glTranslatef(0,0.5,0);
glRotatef(yrot, 0, 0.5, 0);
//glTranslatef(0,-0.5,0);
//glTranslatef(0,0,0.5);
glRotatef(zrot, 0, 0, 0.5);
//glTranslatef(0,0,-0.5);
cube();
/*
xrot = xrot + 0.5;
yrot = yrot + 0.5;
zrot = zrot + 0.5;*/
glutSwapBuffers();
glPopMatrix();
}

void reshape(int w, int h)//重新绘制窗口
{
if(h==0) h = 1;
glViewport(0, 0, (GLsizei) w, (GLsizei) h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45.0, (GLfloat)w/(GLfloat)h, 0.1, 100.0);
glMatrixMode(GL_MODELVIEW);
}

void init(int width, int height )
{
if(height == 0) height = 1;
glClearColor(0.0, 0.0, 0.0, 0.0);
glClearDepth(1.0);
glDepthFunc(GL_LESS);
glEnable(GL_DEPTH_TEST);
glShadeModel(GL_SMOOTH);

glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45.0, (GLfloat)width/(GLfloat)height, 1, 100.0);
glMatrixMode(GL_MODELVIEW);
}

void keyboard(unsigned char key, int w, int h)
{
if(key == 'f') // 进入全屏
glutFullScreen();
if(key == 'F') // 退出全屏
{
glutReshapeWindow(640, 480); // 设置窗口大小（不能用初始化的函数）
glutPositionWindow(400, 100); // 设置窗口位置（不能用初始化的函数）
}
if(key == 27) // ESC退出程序
exit(0);
if(key=='x')
xrot = xrot + 10;
if(key=='c')
xrot = xrot - 10;
if(key=='y')
yrot = yrot + 10;
if(key=='z')
zrot = zrot + 10;
}

int main(int argc, char** argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH);
glutInitWindowPosition(400, 100);
glutInitWindowSize(640, 480);
glutCreateWindow("");

glutDisplayFunc(display);
glutIdleFunc(display);

glutReshapeFunc(reshape);
glutKeyboardFunc(keyboard);
init(640, 480);
glutMainLoop();
return 0;
}

[shiter]

http://wenku.baidu.com/view/9f3f6379168884868762d622.html 这个是我之前做的课程设计，旋转的opengl有个函数，你传个向量进去，就绕着这个向量旋转，其他的不用管了

[shiter]

就是nene 的opengl教程，第二课还是第三课就是讲这个

[schlafenhamster]

http://download.csdn.net/detail/schlafenhamster/4206078 “DynViews.zip” “在对话框标签控件中产生OpenGL视图。共有5个不同的gl视图”

[ArthurKingYs]

坐标系 什么的最乱了

[schlafenhamster]

你的程序 修改 如下：

#include <windows.h> // FOR Sleep
#include "glut.h"    // and glut32.lib ,glut32.dll
///////////////////////////////////////////////////////
static GLfloat xrot = 0.0; 
static GLfloat yrot = 0.0; 
static GLfloat zrot = 0.0; 
void cube()//绘制立方体
{
	glBegin(GL_LINES);//绘制坐标轴
    glPointSize(8);  
    glLineWidth(2);  
    glColor3f(1,0.5,0); 
	glVertex3f(0,0,0);  
    glVertex3f(0,1,0);  
    glVertex3f(0,0,0);  
    glVertex3f(1,0,0);  
    glVertex3f(0,0,0);  
    glVertex3f(0,0,1);  
	glEnd();
//绘制立方体
    glBegin(GL_QUADS);
    glColor3f(1.0,0.0,0.0); //红 y轴          
	glVertex3f( 0.5, 0.5,-0.5);                   
    glVertex3f(-0.5, 0.5,-0.5);                  
    glVertex3f(-0.5, 0.5, 0.5);                   
    glVertex3f( 0.5, 0.5, 0.5);  
                                        
	glColor3f(0.0,1.0,0.0); //绿          
    glVertex3f( 0.5,-0.5, 0.5);                    
    glVertex3f(-0.5,-0.5, 0.5);                   
    glVertex3f(-0.5,-0.5,-0.5);                   
    glVertex3f( 0.5,-0.5,-0.5);

    glColor3f(0.0,0.0,1.0); //蓝 x轴          
    glVertex3f( 0.5, 0.5, 0.5);                    
    glVertex3f(-0.5, 0.5, 0.5);                   
    glVertex3f(-0.5,-0.5, 0.5);                  
    glVertex3f( 0.5,-0.5, 0.5);

    glColor3f(1.0,1.0,0.0); //黄           
	glVertex3f( 0.5,-0.5,-0.5);                    
    glVertex3f(-0.5,-0.5,-0.5);                  
    glVertex3f(-0.5, 0.5,-0.5);                   
    glVertex3f( 0.5, 0.5,-0.5); 
                                        
	glColor3f(0.6,0.2,0.2); //棕           
	glVertex3f(-0.5, 0.5, 0.5);                   
    glVertex3f(-0.5, 0.5,-0.5);                  
    glVertex3f(-0.5,-0.5,-0.5);                  
    glVertex3f(-0.5,-0.5, 0.5);   
                                        
    glColor3f(0.6,0.1,0.9); //紫 z轴          
	glVertex3f( 0.5, 0.5,-0.5);                  
    glVertex3f( 0.5, 0.5, 0.5);                  
    glVertex3f( 0.5,-0.5, 0.5);          
    glVertex3f( 0.5,-0.5,-0.5);
    glEnd();                            
}

void display(void)//显示
{
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glLoadIdentity();
//glPushMatrix();
    glTranslatef(0, 0, -5);
//glTranslatef(0,0,0);
	glRotatef(xrot, 0.5, 0, 0);
//glTranslatef(0,0,0);
//glTranslatef(0,0.5,0);
    glRotatef(yrot, 0, 0.5, 0);
//glTranslatef(0,-0.5,0);
//glTranslatef(0,0,0.5);
    glRotatef(zrot, 0, 0, 0.5);
//glTranslatef(0,0,-0.5);
    cube();
    glutSwapBuffers();
	glPopMatrix();
//
    xrot += 0.5;
    yrot += 0.5;
    zrot += 0.5;
// speed control
	Sleep(20);
}

void reshape(int w, int h)//重新绘制窗口
{
    if(h==0) h = 1;
	glViewport(0, 0, (GLsizei) w, (GLsizei) h);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluPerspective(45.0, (GLfloat)w/(GLfloat)h, 0.1, 100.0);
    glMatrixMode(GL_MODELVIEW);
}

void init(int width, int height )
{
    if(height == 0) height = 1;
    glClearColor(0.0, 0.0, 0.0, 0.0);
    glClearDepth(1.0);
    glDepthFunc(GL_LESS);
    glEnable(GL_DEPTH_TEST);
    glShadeModel(GL_SMOOTH);

    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluPerspective(45.0, (GLfloat)width/(GLfloat)height, 1, 100.0);
    glMatrixMode(GL_MODELVIEW);
}

void keyboard(unsigned char key, int w, int h)
{
    if(key == 'f') // 进入全屏
        glutFullScreen();
    if(key == 'F') // 退出全屏
    {
        glutReshapeWindow(640, 480); // 设置窗口大小（不能用初始化的函数）
        glutPositionWindow(400, 100); // 设置窗口位置（不能用初始化的函数）
    }
    if(key == 27) // ESC退出程序
        exit(0);
	if(key=='x') xrot = xrot + 10;
	if(key=='c') xrot = xrot - 10;
	if(key=='y') yrot = yrot + 10;
	if(key=='z') zrot = zrot + 10;
}

int main(int argc, char** argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH);
    glutInitWindowPosition(400, 100);
    glutInitWindowSize(640, 480);
    glutCreateWindow("");

    glutDisplayFunc(display);
    glutIdleFunc(display);
    
    glutReshapeFunc(reshape);
    glutKeyboardFunc(keyboard);
    init(640, 480);
    glutMainLoop();
    return 0;
}

3轴一起 转